dt-bindings: nfc: st,st95hf: convert to dtschema

Convert the ST ST95HF NFC controller to DT schema format.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20211011073934.34340-6-krzysztof.kozlowski@canonical.comSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/net/nfc/st,st95hf.yaml

+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/nfc/st,st95hf.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: STMicroelectronics ST95HF NFC controller
+
+maintainers:
+  - Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
+
+properties:
+  compatible:
+    const: st,st95hf
+
+  enable-gpio:
+    description: Output GPIO pin used for enabling/disabling the controller
+
+  interrupts:
+    maxItems: 1
+
+  reg:
+    maxItems: 1
+
+  st95hfvin-supply:
+    description: ST95HF transceiver's Vin regulator supply
+
+  spi-max-frequency: true
+
+required:
+  - compatible
+  - enable-gpio
+  - interrupts
+  - reg
+  - spi-max-frequency
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        nfc@0{
+            compatible = "st,st95hf";
+            reg = <0>;
+
+            spi-max-frequency = <1000000>;
+            enable-gpio = <&pio4 GPIO_ACTIVE_HIGH>;
+            interrupt-parent = <&pio0>;
+            interrupts = <7 IRQ_TYPE_EDGE_FALLING>;
+        };
+    };

Documentation/devicetree/bindings/net/nfc/st95hf.txt

-* STMicroelectronics : NFC Transceiver ST95HF
-
-ST NFC Transceiver is required to attach with SPI bus.
-ST95HF node should be defined in DT as SPI slave device of SPI
-master with which ST95HF transceiver is physically connected.
-The properties defined below are required to be the part of DT
-to include ST95HF transceiver into the platform.
-
-Required properties:
-===================
-- reg: Address of SPI slave "ST95HF transceiver" on SPI master bus.
-
-- compatible: should be "st,st95hf" for ST95HF NFC transceiver
-
-- spi-max-frequency: Max. operating SPI frequency for ST95HF
-	transceiver.
-
-- enable-gpio: GPIO line to enable ST95HF transceiver.
-
-- interrupts : Standard way to define ST95HF transceiver's out
-	interrupt.
-
-Optional property:
-=================
-- st95hfvin-supply : This is an optional property. It contains a
-	phandle to ST95HF transceiver's regulator supply node in DT.
-
-Example:
-=======
-spi@9840000 {
-	reg = <0x9840000 0x110>;
-	#address-cells = <1>;
-	#size-cells = <0>;
-	cs-gpios = <&pio0 4>;
-
-	st95hf@0{
-		reg = <0>;
-		compatible = "st,st95hf";
-		spi-max-frequency = <1000000>;
-		enable-gpio = <&pio4 0>;
-		interrupt-parent = <&pio0>;
-		interrupts = <7 IRQ_TYPE_EDGE_FALLING>;
-	};
-
-};